Malicious PDF — malware analysis report

Static analysis result for SHA-256 f8362794a391b581…

MALICIOUS

PDF

79.1 KB Created: 2021-02-27 03:50:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 943ddc418c3dd9e08657b0646513ca08 SHA-1: 391c19a06ac0e34c064cd87ba7d6fa48ee0bb76d SHA-256: f8362794a391b5818f23a3c1c37bb38d77a31b69c93e06b5c59a7a295afd8c1c
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was detected as malicious by ML classifiers and ClamAV. It contains an embedded URL that, when visited, likely leads to a phishing or malware distribution site. The document body, though heavily obfuscated, appears to be a search result for technical information, suggesting a pretext to trick users into clicking the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://kuzutuzo.ru/strik?utm_term=where+is+the+filter+on+a+frigidaire+washer PDF link annotation
    • https://cdn.sqhk.co/vulovosovem/aD8Neig/history_of_thanksgiving_history._com.pdfIn PDF document text
    • http://mikovil.mywebcommunity.org/dr_brown_microwave_steriliser_dimensions.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473388/normal_603984c674122.pdfIn PDF document text
    • http://fabimepela.22web.org/90696274113.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402533/normal_5fd0af4db9ad2.pdfIn PDF document text
    • https://cdn.sqhk.co/wuluzajiroz/hh0XYvd/flexeril_half_life.pdfIn PDF document text
    • http://xekuluw.iblogger.org/64649927887.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365560/normal_5fe8fa4aeedff.pdfIn PDF document text
    • http://rowowesofazov.medianewsonline.com/22585089631.pdfIn PDF document text
    • https://cdn.sqhk.co/gepibilis/JIjj2hg/84261131569.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466376/normal_602e2957daa27.pdfIn PDF document text
    • http://jidagepopisar.22web.org/20246387895.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/wibedubosateg/new_movies_2019_telugu_free_mp4.pdfIn PDF document text
    • http://bejuxufuvojofa.rf.gd/jumugagikojetuposoran.pdfIn PDF document text
    • https://s3.amazonaws.com/novifamigot/fortiswitch_1048d_data_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/zukogi/72022277292.pdfIn PDF document text
    • https://s3.amazonaws.com/pogolo/63203622996.pdfIn PDF document text
    • https://s3.amazonaws.com/zugutixe/mirabuximupudovar.pdfIn PDF document text
    • https://s3.amazonaws.com/dowadotiju/41897379848.pdfIn PDF document text
    • http://funizenobuwuka.epizy.com/jenadade.pdfIn PDF document text
    • https://s3.amazonaws.com/gazitif/xoxuzapopujofut.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f84d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF84D 5272 bytes
SHA-256: 9f345954c6f847d3e3efef7843f71eee8af4c6ce0c73c3fdf2c3579b207260e2
font_01_sfnt_off00010a50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A50 10552 bytes
SHA-256: 62a626ba63f34b27ab0f4368c1d979f646462da0379e432e3ef19978084a9e47

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